CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 333 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 Which colour of light is strongest in rgb(111, 24, 237)? (a) red (b) blue (c) green
2. 2.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) blue (d) black
3. 3.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) green (c) white (d) red
4. 4.🌈 Which colour of light is strongest in rgb(242, 115, 74)? (a) green (b) blue (c) red
5. 5.🌈 In #000012 the blue part is the hex number 12. What is it as a normal number?
6. 6.🌈 Which colour is #ffff00? (a) magenta (b) blue (c) red (d) yellow
7. 7.🌈 In #0000e2 the blue part is the hex number e2. What is it as a normal number?
8. 8.🌈 Which colour is #ff00ff? (a) magenta (b) black (c) red (d) blue
9. 9.🌈 Which colour of light is strongest in rgb(124, 3, 222)? (a) blue (b) red (c) green
10. 10.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) magenta (c) red (d) cyan
11. 11.🌈 In #0000fc the blue part is the hex number fc. What is it as a normal number?
12. 12.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) red (c) magenta (d) black
13. 13.🌈 Which colour is rgb(255, 255, 255)? (a) magenta (b) white (c) black (d) cyan
14. 14.🌈 Which colour is #00ff00? (a) cyan (b) red (c) bright green (d) blue
15. 15.🌈 In #0000d8 the blue part is the hex number d8. What is it as a normal number?
16. 16.🌈 Which hex code is black? (a) #ff0000 (b) #000000 (c) #00ff00 (d) #ffffff
17. 17.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) yellow (c) red (d) blue
18. 18.🌈 Which hex code is blue? (a) #ff00ff (b) #00ff00 (c) #0000ff (d) #ffff00
19. 19.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 2 (c) 6 (d) 4
20. 20.🌈 Which colour is rgb(255, 0, 255)? (a) black (b) yellow (c) blue (d) magenta
21. 21.🌈 Which colour is #000000? (a) black (b) red (c) white (d) cyan
22. 22.🌈 Which colour is #ff0000? (a) magenta (b) cyan (c) yellow (d) red
23. 23.🌈 In #00b200 the green part is the hex number b2. What is it as a normal number?
24. 24.🌈 Which colour of light is strongest in rgb(121, 136, 187)? (a) green (b) blue (c) red
25. 25.🌈 In #bf0000 the red part is the hex number bf. What is it as a normal number?
26. 26.🌈 Which colour of light is strongest in rgb(68, 86, 152)? (a) green (b) blue (c) red
27. 27.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) J (c) F (d) Z
28. 28.🌈 Which colour is #ffffff? (a) magenta (b) cyan (c) bright green (d) white
29. 29.🌈 In #000d00 the green part is the hex number 0d. What is it as a normal number?
30. 30.🌈 Which colour of light is strongest in rgb(7, 172, 43)? (a) blue (b) green (c) red
31. 31.🌈 In #620000 the red part is the hex number 62. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(51, 132, 206)? (a) blue (b) red (c) green
33. 33.🌈 Which colour of light is strongest in rgb(93, 51, 234)? (a) green (b) red (c) blue
34. 34.🌈 Which hex code is bright green? (a) #000000 (b) #ffffff (c) #ffff00 (d) #00ff00
35. 35.🌈 Which colour of light is strongest in rgb(14, 25, 215)? (a) red (b) green (c) blue
36. 36.🌈 Which colour is #0000ff? (a) white (b) magenta (c) yellow (d) blue
37. 37.🌈 Which hex code is red? (a) #ff00ff (b) #00ff00 (c) #ffffff (d) #ff0000
38. 38.🌈 In #00ff00 the green part is the hex number ff. What is it as a normal number?
39. 39.🌈 Which colour is #00ffff? (a) red (b) bright green (c) yellow (d) cyan
40. 40.🌈 In #b70000 the red part is the hex number b7. What is it as a normal number?

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